Fix compile warnings (#881)

vtm-android/src/org/oscim/android/MapView.java

@@ -92,6 +92,7 @@ public class MapView extends GLSurfaceView {
         this(context, null);
     }
 
+    @SuppressWarnings("deprecation")
     public MapView(Context context, AttributeSet attributeSet) {
         super(context, attributeSet);
 

vtm-android/src/org/oscim/android/canvas/AndroidGraphics.java

@@ -107,6 +107,9 @@ public final class AndroidGraphics extends CanvasAdapter {
         return new AndroidBitmap(bitmap);
     }
 
+    /**
+     * @deprecated
+     */
     public static Bitmap drawableToBitmap(Resources res, int resId) {
         return drawableToBitmap(res.getDrawable(resId));
     }

vtm-android/src/org/oscim/android/gl/AndroidGL30.java

@@ -35,12 +35,12 @@ package org.oscim.android.gl;
 
 import android.annotation.SuppressLint;
 import android.opengl.GLES30;
-
 import org.oscim.backend.GL30;
 
 /**
  * See https://github.com/libgdx/libgdx/blob/master/backends/gdx-backend-android/src/com/badlogic/gdx/backends/android/AndroidGL30.java
  */
+@SuppressWarnings("deprecation")
 @SuppressLint("NewApi")
 public class AndroidGL30 extends AndroidGL implements GL30 {
     @Override